Automobile-guard.



GEORGE T. BURRELL, 0F RIVER FOREST, LLINOIS.

AUToMoBLELGUAnn,

Application inea December 2, 1915.

concern:

it, GEORGE T. BURRELL, residing at To all whom it mgnz/ Be itknown that a citizen of the United States, River -Foresh llinois, and useful )Improvements in Automobiley Guards, of which the following is a specifi? cation. l v

rliis invention relates vto an automobile guard, intended to prevent unauthorized operation of a motor car and to give an alarm when unauthorized operation is attempted. Guarding devices of this kind are known wherein the ignition circuit for the engine,

Specification of Letters Patent.

have invented neWw Patented hilary 8, anni.

'sei-iai No. 64,713.

loek which eontrolsthe exhaust guard, so

that the fuel supply may be sluit ofiq simultaneously with the closure ot' the exhaust -path for the burnt gases.

Another object of the invention is to providejfa lock controllingr the various tlu'ottle and interrupting devices in the tootboard ot' the ear, to render the saine iuaeeessible Without actually boarding the vehicle, and to protect the look against the entrance of dirt., dust, and the like.

With these and other objects in View, sev eral embodiments of the invention are dewunmi Hm lfnllnwino' soeeication and 10, disposed underneath the drivers seat, is connected by means oia pipe 11 with a carbureter 12, diagrammatically indicated in Fig. 1, and from this carbureter the i'uel may be introduced by suitablev devices and in proper timely relation to the various cylinders of the engine.

An exhaust guard 13 is inserted into the exhaust conduit 2, preferably in that por-- tion ot said conduit which passes underneath the iootboard 1l at the drivers seat. As may be seen in Fig. 2, this guarding device comprises a casting having anges 15 which are connected with suitable flanges 16 ot' portions of the exhaust conduit by a plurality of fastening means shown as bolts 17. Gasket rings may be inserted between the flanges 15 and 16 to prevent leakage of the burnt gases. The casting 13, communicating with the exhaust 2, is provided with a branch or by-pass 18, to which the gases passing through the conduit in the direction or' the area shown in Fig. 2 may be admitted when a valve, `19, is placed in proper position. This valve, being shown in Fig. 2 as a wing valve', is mounted on a stem 20, which is pivotally located in the branch or by-pass 18 and which may be held normally in the position indicated in dotted lines in Fig. 2, whereby the gases may be passed through the unobstructed conduit 2 to the muffler.d The passage of the gases through the by-pass 18 is furthermore obstructed by the provision of elements adapted to reduce the area of the passageway for the gases through said bypass. In Fig. 2 a plate 21 preferably inte- `gral with the casting 13, is provided with a number of small apertures or slots 22 through which the gases must pass prior to their;` entrance into the branch`18 of the casting. rlhe total arca of these apertures 22 is considerably smaller than the area or" the passageway for the gases in the com duit 2, whereby back pressure will be produced within the exhaust conduit 2 and within the cylinders connected with said conduit when the exhaust gases are compelled to escape through the said apertures 22. After having passed through said apertures.; an escape of the gases into the atmosphere is possible only through narrow slots 23, and in the escape of the gases through these narrow slots an audible'signal will be given, owing to the fact that the area through which the gases may escape is considerably reduced.

An exhaust guard 13 may also be provided with a tubular extension 24, projecting upwardly trom the casting 13 when the parts are assembled and serving as a guiding means and support for the extension 25 on the valve stein or pivot 20. The upper portion of the tubular extension 25 is constructed as a lock barrel 26 adapted for coperation with a companion lock member 27 in which tumblers 28 of ordinary wellknown construction are retained by suitable means not shown :nu the drawing.A This barrel also is provided with a keyhole 29 into which a key 30 may be introduced 'for releasing the tumblers from engagement with the barrel, whereby the latter and the valve may be rotated from one terminal position to another and may be held in either end positiomuntil it is released by the introduction of trie key 30 and by the turning of said key. The ogeration or' locks -of this kind is well-known and does not require further description. The tumbler retaining member 27 may be constructed as a flange connected with the tubular extension 24 of the cast-ing 13.

lVhile in Fig. 3 the lock is shown in combination with the exhaust guard only, it is an object of the invention to combine with this exhaust guard and lock i'or the same, additional means for safeguarding the automobile against unauthorized operation, and for this purpose the .lock may be combined with additional devices (as, :tor instance, shcwn in Figs. 1 circuit and the fue] supply when it is desired to lock the car. The extension 25of the valve stem is guided and supported in a tubular projection 24', which may be integral with the exhaust guard or which may be connected with the same. The upper end of the extension 25 is again constructed as a lock barrel 26, the tumblers and retaining member not being shown in Fig. 41. An insulating plate 30', rigidly secured tothe upper end of thebarrel 26, carries on its under surface'a semi-circular metallicplate 31, as shown in Fig. 7. The ends of this semicircular plate 31 are adapted to make contact with pins 32 forming the terminal points of the conductor portions 9, which, as may be seen trom Fig.'1,lead to the source of electric energy and to the distributing device respectively. 1n order to facilitate the attachment of the pins 32 to the conductor portions 9, metallic clips 33 may be fastened to the conductors by screws 34, which enter the under surface of the footboard 14:. The upperparts of the clips 33 rest on the horizontal tlangewof a bushing 35 of ,insulating material which is placed on top of the lock and Ll.) interrupting an electrical member 27 and which surrounds the barrel this arm is in pivotal connection with the free end of an arm 38, rigidly secured its other end to the stem 39 ot a valve plug or the like, indicated at 4G, in the valve casing l1 which is inserted in the conduit 11 serving for the supply of the fuel to the engine. Upon the rotation of 'barrel 26 and extension into locking position, the arm 3G also will be turned, and, owing to its pivotal connection with the arm 3S, it will rotate the valve 40, so that said valve obstructs the passage of the fuel supply to the engine. Vfhen the barrel is released and turned into unlocking position, the fuel may again pass practically unobstructed. to the engine.

ln order to protect the barrel and the parts pertaining' thereto against the entrance of dirt ,or other substances, the aperture in the tooth/card 14, inlwhich the barrel is located, may be closed by a hinged cover Lil-2, which can be swung into open position when it is desired to insert a key into the keyhole 'of the barrel for turning the same.

' A modified embodiment ot' the exhaust guard, illustrating a different form ot' ein haust throttle and whistle, is shown in lliv. 5 and may be connected with the combination of parts as shown in Fig. a. rlhe ex` haust guard of, this embodiment comprises a casting 13 having a. by-pass or branch 18', the entrance of the gases to the by-pass being normally prevented by a wing valve 19 when said valve is in the position indicated in 6. 1f this valve, however, is turned about its pivotal support (indicated at 45), the exhaust gases trom-the conduit 2 will be forced' toenter the ley-pass 1S through a throttling or reducing passage 46 formed between the annular projection 22 in the bypass or branch 18 and a stem 47, projecting in direction ot the flow of the gases through loy-pass. A cup L18 is rigidly secured to the lower end ot the stem in such position that the upper edge oli said cup is in opposition to the restricted passage 4G. Vlhe exhaust gases therefore will be compelled to enter said cup 18; where, owing to the limited space for the saine, a whirling, rapid motion will be imparted to said gases, and they will Viinally escape in a counter current flow through the open end oil? the bypass 18. The reduction ot the exhaust passage will not only produce back pressure., in the engine, thereby preventing the normaloperation of the same; but it will also result in a noisy signal, in the iorm ot' a whistling sound, being produced. by the escape of the gases through said passage.

"l`he operation ot' the device is apparent from the specification given above. llhen it is desired to lock the car against operation, the normal exhaust conduit' -lor the burnt gases is obstructed bythe rotation of the valve 19 or 19 into .a position. in. which the gases will. be forced through the lay-pass 1S or 18 respectively. rlhe valve is maintained in said position the lock 25 or 25, and it is necessary for the operation ot' the car to turn said lock into a position in which thevalve 1S) or 19 will freeze the exhaust conduit. The valve will remain locked in said open position until the lock is operated again to place the valve into the iirst named position. The throttling of the exhaust gases will not only produce the back pressure in the engine as statedind prevent thereby the car from assuming itsnornial speed, but it will also result in the production of an exhaust noise which is so different from the noise ordinarily accompanying tlie exhaust of gas engines that the engine cannot be operated lwithout calling` everybodys attention to the fact that an attempt is made to run this car without authorization. 1t is also obvious that it is more diiiicult to renderl this guard inoperative without operation of the lock than any or' the other guards known. The elements preventing the normaloperation and giving the audible signal are inclosed in a casting which is rigidly connected with another relatively heavy casting ot' the engine, and only by up this rigid connection or by breaking these castings would it be possible to elimie the guard. i

Vllhile only two different embodiments of the signal device operated by the exhaust gases are shown and described, it isalso obvious that many other signal devices may be used for the same purpose and in the exhaust conduit, and muy produce an audible signal which can be noticed, owing to its intensity, over a far larger area than electric alarm bells and other similar signal devices.

1 claim:

- 1. In an automobile, the Combination of an engine, a foot board, an exhaust conduit extending from the engine underneath said foot board, a device lior throttling the exhaust gases inserted in said conduit underneath said foot board, and a lock in the foot board Jfor placing and holding said throt tling device in ope ative or inoperative position.

2. ln an automobile, the combination of an engine; an exhaust conduit connected with the engine, and extending underneath the toot board, an alarm device operatable by the exhaust gases disposed in said con duit underneath the foot board, and a lock operated in said foot board, placing said ""alarm device in operative or in inoperative position respectively.

' safety device i'orautomobiles,including in combination with the exhaust of. the automobile engine, a inov'able element adapted to create back pressure' when moved in a predetermined position, and means for locking said back pressure element in said positien.

breaking y 4. In a safety device for automobiles, in combination with the exhaust conduit of the automobile engine, an element within said element is moved in said piredeterminedposition, and means for locking said element in said position.

5. In a safety device for automobiles, the combination with the exhaust conduit of the automobile engine, of a lockable back pressure creating device combined with an alarm device, anignition circuit, and a switch for the same, the lock for said back pressure and alarm device being operatively connect ed with the ignition circuit switch.

A 6. A safety device for automobiles, including in'combination with the exhaust of the automobile engine, a back pressure creating device in said exhaust, an alarm device associated with said back pressure creating device, a lock for said back pressure device,

7. A safety device for automobiles, in

cluding in combination with the exhaust of the automobile enginea back pressure creating device, an alarm signal device associated therewith, a lock for maintaining said back pressure creating device in operative position, an ignition circuit, a switch for the same, a fuel supply conduit, a valve in said conduit, and means for permanently connecting the lock for the back' pressure de. loe with the valve and the ignition circuit switch, whereby upon placing said lock in operative position the fuel supply is automatically interrupted and the ignition circuit is automatically opened. Y

ln testimony whereof l affix my signature.

GEORGE T. BURRELL. 

